By ExploreNow Editor, on May 6th, 2012%
Volcano Type: Submarine volcano
Volcano Status: Fumarolic
Last Known Eruption: Unknown
Summit Elevation: 600 m 1,968 feet
Latitude: 36.321°S 36°19’15″S
Longitude: 178.028°E 178°1’42″E
Tangaroa submarine volcano in the southern Kermadec arc rises to within 600 m of the sea surface. The volcano is elongated in a NW-SE direction and contains smaller cones on its SE to eastern flanks. A larger edifice lies further to the SE. Tangaroa lies between Clark and Rumble V submarine volcanoes near the southern end of the Kermadec arc and is one of more than a half dozen volcanoes in this part of the arc showing evidence for active hydrothermal vent fields.
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Originally posted 2010-09-13 12:59:12.
By ExploreNow Editor, on April 10th, 2012%
Volcano Type: Cinder cones
Volcano Status: Holocene?
Last Known Eruption: Unknown
Summit Elevation: 397 m 1,302 feet
Latitude: 35.75°S * 35°45’0″S
Longitude: 174.27°E 174°16’0″E
 Fishing in Whangarei The Whangarei volcanic field, named after the adjacent Whangarei Harbor, consists of Quaternary basaltic scoria cones and lava flows. The field lies in the central part of the Northland Peninsula, at the southernmost end of the Northland Intraplate Province. In addition to the younger dominantly basaltic rocks, Miocene dacitic lava domes and rhyolitic breccias are also present at Whangarei. Quaternary volcanics form a group of large cones SE of Whangarei, a NE-aligned group of scoria cones north of the city, and a group of lava flows east of the city along a major fault. The youngest basalts were mapped as Holocene (Kear and Thompson, 1964), although the age of the field is not well known and there are some indications that the latest eruption may have been during the late Pleistocene, about 30,000 years ago (Latter 1994, pers. comm.).
 Whangarei Heads  Whangarei Heads Click Here For The Rest Of Whangarei, New Zealand
Originally posted 2010-09-03 12:11:36.
By ExploreNow Editor, on March 22nd, 2012%
Volcano Type: Stratovolcanoes
Volcano Status: Historical
Last Known Eruption: 2001
Summit Elevation: 321 m 1,053 feet
Latitude: 37.52°S 37°31’0″S
Longitude: 177.18°E 177°11’0″E
Uninhabited 2 x 2.4 km White Island, one of New Zealand’s most active volcanoes, is the emergent summit of a 16 x 18 km submarine volcano in the Bay of Plenty about 50 km offshore of North Island. The 321-m-high island consists of two overlapping andesitic-to-dacitic stratovolcanoes; the summit crater appears to be breached to the SE because the shoreline corresponds to the level of several notches in the SE crater wall. Volckner Rocks, four sea stacks that are remnants of a lava dome, lie 5 km NNE of White Island. Intermittent moderate phreatomagmatic and strombolian eruptions have occurred at White Island throughout the short historical period beginning in 1826, but its activity also forms a prominent part of Maori legends. Formation of many new vents during the 19th and 20th centuries has produced rapid changes in crater floor topography. Collapse of the crater wall in 1914 produced a debris avalanche that buried buildings and workers at a sulfur-mining project.
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Originally posted 2010-08-20 05:02:04.
By ExploreNow Editor, on March 14th, 2012%
Volcano Type: Caldera
Volcano Status: Pleistocene-Geysers
Last Known Eruption: Pleistocene
Summit Elevation: 757 m 2,484 feet
Latitude: 38.08°S 38°5’0″S
Longitude: 176.27°E 176°16’0″E
The 22-km-wide Rotorua caldera is the NW-most caldera of the Taupo volcanic zone. Rotorua is the only single-event caldera in the Taupo volcanic zone and was formed about 220,000 years ago following eruption of the >340 cu km rhyolitic Mamaku Ignimbrite. Although caldera collapse occurred in a single event, the process was complex and involved multiple collapse blocks. The major city of Rotorua lies at the south end of the lake that fills much of the caldera. Post-collapse eruptive activity, which ceased during the Pleistocene, has been restricted to lava dome extrusion without major explosive activity. The youngest eruptive activity at Rotorua consisted of the eruption of three lava domes less than 25,000 years ago. The major thermal areas of Takeke, Tikitere, Lake Rotokawa, and Rotorua-Whakarewarewa are located within the caldera or outside its rim, and the city of Rotorua lies within and adjacent to active geothermal fields.
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Originally posted 2010-09-03 12:19:26.
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